Bug 172086 - reboot hang with 'All buffers synced' after freebsd-update FreeBSD9 to p3 on ZFS root
Summary: reboot hang with 'All buffers synced' after freebsd-update FreeBSD9 to p3 on ...
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: misc (show other bugs)
Version: Unspecified
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-bugs (Nobody)
Depends on:
Reported: 2012-09-26 09:50 UTC by Marek
Modified: 2017-12-31 22:29 UTC (History)
0 users

See Also:


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Description Marek 2012-09-26 09:50:06 UTC
I have a problem with FreeBSD 9-RELEASE installed on ZFS mirror file system using tips from here:

Immediately after installation I'm inovking:
# freebsd-update fetch
# freebsd-update install

Update is always successfull, but when I invoke:
# reboot / # shutdown -r / # halt / # poweroff / etc.

system will try to reboot, but will stop on the

All buffers synced


The funny thing is that the server is responding to ping's, prints messages if I attach USB stick etc.

This problem doesn't take place if FreeBSD is installed "normally", on UFS.

Also it doesn't occurs when I remove 'world' from Components in /etc/freebsd-update.conf

(so the line looks like this):
Components src kernel

The problem also occurs when I invoke
# freebsd-update rollback

The interesting fact is that after invoking the 'freebsd-update fetch' we get list of files to be updated with information:

The following files will be updated as part of updating to 9.0-RELEASE-p4

but after reboot we've go the -p3 version.


I searched a lot, but found nothing related to freebsd-update.

Thank you for your time,

How-To-Repeat: The problem is very easy to reproduce:
Just create Virtual Machine in VirtualBox with two disks, install using instructions I have used (http://wiki.freebsd.org/RootOnZFS/GP...ot/9.0-RELEASE), after installation reboot, login as root, invoke:

# freebsd-update fetch
# freebsd-update install
# reboot
Comment 1 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 08:01:32 UTC
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

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